I bought these recently to replace the strings that came on my Mathews Vertix. Those strings were a few years old and worn/stretched badly.
The color is pretty cool and it actually matches my release pretty closely. I hadn't planned that but it's a nice bonus.
I had them installed at a local bow shop and that went smoothly. I've shot a few hundred arrows since the install without issue. There appears to be no break in period at this point.
I can't confirm but I feel like the bow is shooting faster than it did with the old strings. I'll have to shoot it through a chronograph to be sure. I'm super happy with the purchase and will definitely buy more when the time comes.